# Cassiopeia A Supernova

A 3D model from NASA/T. Delaney, [NASA](https://science.nasa.gov/3d-resources/cassiopeia-a-supernova/).

- Licence: [Not subject to copyright in the United States (NASA)](https://www.nasa.gov/nasa-brand-center/images-and-media/)
- Credit: NASA/T. Delaney
- Model (GLB): [https://assets.science.nasa.gov/content/dam/science/cds/3d/resources/model/cassiopeia-a-supernova/Cassiopeia%20A%20Supernova.glb](https://assets.science.nasa.gov/content/dam/science/cds/3d/resources/model/cassiopeia-a-supernova/Cassiopeia%20A%20Supernova.glb)
- Not offered in your room: its source does not state the model's scale, so it could not be shown at its true size.

Cassiopeia A (Cas A) is the debris field left behind after a massive star exploded. This explosion would have appeared in Earth’s sky over 300 years ago. Scientists have combined data from Chandra, NASA’s Spitzer Space Telescope, and ground-based facilities to construct a unique 3D model of the 300-year old remains of a stellar explosion \[…\]